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IQ DAT A PLUS I I
Section 6
APPLICATION CONSIDERATIONS
6.0 General
- This Section contains various considerations
to be kept in mind when applying the IQ Data Pl us II to a
specific application. It is designed primarily for the systems
or application engineer responsible for making up the wiring
plan drawings.
It is strongly suggested that all earlier Sections - especially
2 and 3 - be read thoroughly before proceeding.
DIP
Slide
Switch
Switch
1
2
3
4
5
6
SW1
7
8
6.1 .1 Current Transformer Ratio
provided external current transformers can vary from 100:5
SW1 , Nos. 1 thru
to 5000:5. Switch
respond to the external current transformer's ratio, as listed
in Table 6.8.
The CT's must be chosen so that at least 20% of the pri
mary rated current is drawn. The 1 % accuracy of the IQ
Data Plus II is valid only above 20% of the current rating.
Below 2% of the primary rated current, the IQ Data Plus
II reads zero current.
Courtesy of NationalSwitchgear.com
Table 6.A
IQ DATA PLUS II INSTALLATION RECORD SHEET: SW1
Setting
ON/OFF
Combinations
-
-
The ratio of the external current transformers
-
(1 00/150/200/250/300/400/500/600/800/1000/1200/1500/1600/
2000/2500/3000/3200/4000/5000)
-
-
Line frequency ON
-
-
Action on over/undervoltage/phase unbalance detection.
Action
OFF
AC line wiring
-
3 wire or 4 wire
The ratio of the user
-
5 must be set to cor
30
6.1 DIP Switch Settings
located on the right rear side of the chassis, tailor each IQ
Data Plus II to a specific application The switches provide 18
selection groupings which must be set by the user during
installation. Once these settings are determined, they should
be recorded on a copy of the Installation Record Sheet, shown
in Tables 6.A, 6.C, 6.H, 6.K, 6.N, 6.0. The filled-in Record Sheet
should then be made available to the installation team and
to maintenance personnel. Paragraph 4.3 describes how to
physically set the switches.
Description
60 Hz; OFF
=
i mmed. (Delay/immediate)
=
i mmediate; ON
delay
=
=
3 wire
ON
=
=
OFF
6.1 .2 Display Current
-
ing in the Display Window is auto ranged to represent
amperes to kiloamperes.
T D 17271 A
- A number of DIP switches,
:5
=
__
Refer to Table 6. 8
50 Hz
=
4 wire
3 wire
=
The AC line current level appear
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